01 - Heat a large skillet over medium heat. Add sliced Cajun-style beef sausage and cook for 3 to 4 minutes until browned. Remove sausage and set aside.
02 - In the same skillet, add the diced peppers and sliced red onion. Sauté for about 5 minutes until softened, then season with Cajun seasoning, smoked paprika, salt, and black pepper. Stir until evenly coated.
03 - Return the browned sausage to the skillet with the vegetables. Mix and cook for 2 additional minutes. Transfer mixture to a bowl, then wipe the skillet clean.
04 - Melt 1/2 tablespoon butter in the skillet over medium heat. Place one large flour tortilla in the pan. Sprinkle a quarter of the cheese mixture evenly over half the tortilla, then add a quarter of the sausage and vegetable filling. Fold the tortilla to enclose the filling.
05 - Cook the folded tortilla for 2 to 3 minutes per side, or until golden brown and the cheese has melted. Repeat assembly and cooking process with remaining tortillas, butter, cheeses, and filling.
06 - Transfer quesadillas to a cutting board, slice into wedges, and serve hot.